Add Vorlagen editor, upload portal, onboarding, and participant import command

- Dokument-Vorlagen-Editor: create/edit/reset document templates (admin)
- Upload-Portal: public portal for Nachweis uploads via token
- Onboarding: invite Destinatäre via email with multi-step wizard
- Bestätigungsschreiben: preview and send confirmation letters
- Email settings: SMTP configuration UI
- Management command: import_veranstaltung_teilnehmer for bulk participant import

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/stiftung/views/system.py

@@ -1878,7 +1878,50 @@ def email_settings(request):
             },
         )
 
-    imap_settings = AppConfiguration.objects.filter(category="email", is_active=True).order_by("order")
+    # Ensure SMTP settings exist in DB (auto-init)
+    smtp_defaults = [
+        ("smtp_host", "SMTP Server", "Hostname des SMTP-Servers (z.B. smtp.ionos.de)", "smtp.ionos.de", "text", 10),
+        ("smtp_port", "SMTP Port", "Port des SMTP-Servers (465 für SSL, 587 für STARTTLS)", "465", "number", 11),
+        ("smtp_user", "SMTP Benutzername", "Benutzername / E-Mail-Adresse für die SMTP-Anmeldung", "", "text", 12),
+        ("smtp_password", "SMTP Passwort", "Passwort für die SMTP-Anmeldung", "", "password", 13),
+        ("smtp_use_ssl", "SSL/TLS verwenden (SMTP)", "Sichere Verbindung zum SMTP-Server (empfohlen für Port 465)", "True", "boolean", 14),
+        ("smtp_from_email", "Absenderadresse", "Absenderadresse für ausgehende E-Mails", "buero@vhtv-stiftung.de", "text", 15),
+    ]
+    for key, name, desc, default, stype, order in smtp_defaults:
+        AppConfiguration.objects.get_or_create(
+            key=key,
+            defaults={
+                "display_name": name,
+                "description": desc,
+                "value": default,
+                "default_value": default,
+                "setting_type": stype,
+                "category": "email",
+                "order": order,
+            },
+        )
+
+    # Ensure notification settings exist in DB (auto-init)
+    notification_defaults = [
+        ("notification_email", "Benachrichtigungs-E-Mail", "Empfänger für interne Benachrichtigungen (z.B. neue Onboardings). Wenn leer, wird die Absenderadresse verwendet.", "", "text", 20),
+    ]
+    for key, name, desc, default, stype, order in notification_defaults:
+        AppConfiguration.objects.get_or_create(
+            key=key,
+            defaults={
+                "display_name": name,
+                "description": desc,
+                "value": default,
+                "default_value": default,
+                "setting_type": stype,
+                "category": "email",
+                "order": order,
+            },
+        )
+
+    imap_settings = AppConfiguration.objects.filter(category="email", key__startswith="imap_", is_active=True).order_by("order")
+    smtp_settings = AppConfiguration.objects.filter(category="email", key__startswith="smtp_", is_active=True).order_by("order")
+    notification_settings = AppConfiguration.objects.filter(category="email", key="notification_email", is_active=True).order_by("order")
 
     test_result = None
 
@@ -1887,7 +1930,8 @@ def email_settings(request):
 
         if action == "save":
             updated = 0
-            for setting in imap_settings:
+            all_email_settings = AppConfiguration.objects.filter(category="email", is_active=True)
+            for setting in all_email_settings:
                 field_name = f"setting_{setting.key}"
                 if setting.setting_type == "boolean":
                     new_val = "True" if field_name in request.POST else "False"
@@ -1954,13 +1998,124 @@ def email_settings(request):
                         "message": f"Verbindungsfehler: {e}",
                     }
 
+        elif action == "test_smtp":
+            import smtplib
+            import ssl as ssl_module
+            host = get_config("smtp_host")
+            port = int(get_config("smtp_port", 465))
+            user = get_config("smtp_user")
+            password = get_config("smtp_password")
+            use_ssl = get_config("smtp_use_ssl", True)
+
+            if not all([host, user, password]):
+                test_result = {
+                    "success": False,
+                    "message": "SMTP-Server, Benutzername und Passwort müssen konfiguriert sein.",
+                    "section": "smtp",
+                }
+            else:
+                try:
+                    if use_ssl:
+                        context = ssl_module.create_default_context()
+                        conn = smtplib.SMTP_SSL(host, port, context=context, timeout=15)
+                    else:
+                        conn = smtplib.SMTP(host, port, timeout=15)
+                        conn.starttls()
+                    conn.login(user, password)
+                    conn.quit()
+                    test_result = {
+                        "success": True,
+                        "message": f"SMTP-Verbindung erfolgreich! Angemeldet als {user}.",
+                        "section": "smtp",
+                    }
+                except smtplib.SMTPAuthenticationError as e:
+                    test_result = {
+                        "success": False,
+                        "message": f"SMTP-Authentifizierungsfehler: {e}",
+                        "section": "smtp",
+                    }
+                except Exception as e:
+                    test_result = {
+                        "success": False,
+                        "message": f"SMTP-Verbindungsfehler: {e}",
+                        "section": "smtp",
+                    }
+
+        elif action == "test_smtp_send":
+            from django.core.mail import EmailMessage, get_connection
+            from django.utils import timezone
+
+            test_email = request.POST.get("test_email", "").strip()
+            if not test_email:
+                test_result = {
+                    "success": False,
+                    "message": "Bitte geben Sie eine Empfänger-E-Mail-Adresse ein.",
+                    "section": "smtp",
+                }
+            else:
+                host = get_config("smtp_host")
+                port = int(get_config("smtp_port", 465))
+                user = get_config("smtp_user")
+                password = get_config("smtp_password")
+                use_ssl = get_config("smtp_use_ssl", True)
+                from_email = get_config("smtp_from_email", "buero@vhtv-stiftung.de")
+
+                if not all([host, user, password]):
+                    test_result = {
+                        "success": False,
+                        "message": "SMTP-Server, Benutzername und Passwort müssen konfiguriert sein.",
+                        "section": "smtp",
+                    }
+                else:
+                    try:
+                        connection = get_connection(
+                            backend="django.core.mail.backends.smtp.EmailBackend",
+                            host=host,
+                            port=port,
+                            username=user,
+                            password=password,
+                            use_ssl=bool(use_ssl),
+                            use_tls=False,
+                            fail_silently=False,
+                        )
+                        now = timezone.now().strftime("%d.%m.%Y %H:%M")
+                        msg = EmailMessage(
+                            subject=f"[vHTV-Stiftung] SMTP-Test ({now})",
+                            body=(
+                                f"Dies ist eine Test-E-Mail der Stiftungsverwaltung.\n\n"
+                                f"Zeitpunkt: {now}\n"
+                                f"SMTP-Server: {host}:{port}\n"
+                                f"Absender: {from_email}\n\n"
+                                f"Wenn Sie diese E-Mail erhalten, funktioniert der E-Mail-Versand korrekt."
+                            ),
+                            from_email=from_email,
+                            to=[test_email],
+                            connection=connection,
+                        )
+                        msg.send()
+                        test_result = {
+                            "success": True,
+                            "message": f"Test-E-Mail wurde an {test_email} gesendet! Bitte prüfen Sie den Posteingang (und Spam-Ordner).",
+                            "section": "smtp",
+                        }
+                    except Exception as e:
+                        test_result = {
+                            "success": False,
+                            "message": f"E-Mail-Versand fehlgeschlagen: {e}",
+                            "section": "smtp",
+                        }
+
     # Refresh after save
-    imap_settings = AppConfiguration.objects.filter(category="email", is_active=True).order_by("order")
+    imap_settings = AppConfiguration.objects.filter(category="email", key__startswith="imap_", is_active=True).order_by("order")
+    smtp_settings = AppConfiguration.objects.filter(category="email", key__startswith="smtp_", is_active=True).order_by("order")
+    notification_settings = AppConfiguration.objects.filter(category="email", key="notification_email", is_active=True).order_by("order")
 
     context = {
         "imap_settings": imap_settings,
+        "smtp_settings": smtp_settings,
+        "notification_settings": notification_settings,
         "test_result": test_result,
-        "title": "E-Mail / IMAP Konfiguration",
+        "title": "E-Mail-Konfiguration (IMAP & SMTP)",
     }
     return render(request, "stiftung/email_settings.html", context)